add chunk length and batch size parameters to WhisperTranscriber

app.py

@@ -228,7 +228,9 @@ class WhisperTranscriber:
         result = self.pipe(
             audio_path,
             return_timestamps=True,
-            generate_kwargs=generate_kwargs
+            generate_kwargs=generate_kwargs,
+            chunk_length_s=30,
+            batch_size=128,
         )
         
         # Extract segments and detected language